CVE-2026-40161

HIGH

Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL

Title source: cna
STIX 2.1

Description

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. From 1.0.0 to 1.10.0, the Tekton Pipelines git resolver in API mode sends the system-configured Git API token to a user-controlled serverURL when the user omits the token parameter. A tenant with TaskRun or PipelineRun create permission can exfiltrate the shared API token (GitHub PAT, GitLab token, etc.) by pointing serverURL to an attacker-controlled endpoint.

References (3)

Scores

CVSS v3 7.7
EPSS 0.0003
EPSS Percentile 9.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-201
Status published
Products (3)
linuxfoundation/tekton_pipelines 1.0.0 - 1.10.0
tektoncd/pipeline 1.0.0Go
tektoncd/pipeline >= 1.0.0, <= 1.10.0
Published Apr 21, 2026
Tracked Since Apr 21, 2026